ChemInform Abstract: Charge Transport in Metal-Oxide Interfaces: Genesis and Detection of Hot Electron Flow and Its Role in Heterogeneous Catalysis

ChemInform ◽  
2015 ◽  
Vol 46 (10) ◽  
pp. no-no
Author(s):  
Sun Mi Kim ◽  
Hyosun Lee ◽  
Jeong Young Park
Keyword(s):  
Heterogeneous Catalysis ◽  
Metal Oxide ◽  
Charge Transport ◽  
Electron Flow ◽  
Hot Electron ◽  
Oxide Interfaces

scholarly journals Controlling hot electron flux and catalytic selectivity with nanoscale metal-oxide interfaces

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Si Woo Lee ◽  
Jong Min Kim ◽  
Woonghyeon Park ◽  
Hyosun Lee ◽  
Gyu Rac Lee ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Methanol Oxidation ◽  
Methyl Formate ◽  
Electron Flow ◽  
Nanowire Arrays ◽  
Methanol Oxidation Reaction ◽  
Hot Electron ◽  
Oxide Interface ◽  
Oxide Interfaces ◽  
Catalytic Selectivity

AbstractInteraction between metal and oxides is an important molecular-level factor that influences the selectivity of a desirable reaction. Therefore, designing a heterogeneous catalyst where metal-oxide interfaces are well-formed is important for understanding selectivity and surface electronic excitation at the interface. Here, we utilized a nanoscale catalytic Schottky diode from Pt nanowire arrays on TiO2 that forms a nanoscale Pt-TiO2 interface to determine the influence of the metal-oxide interface on catalytic selectivity, thereby affecting hot electron excitation; this demonstrated the real-time detection of hot electron flow generated under an exothermic methanol oxidation reaction. The selectivity to methyl formate and hot electron generation was obtained on nanoscale Pt nanowires/TiO2, which exhibited ~2 times higher partial oxidation selectivity and ~3 times higher chemicurrent yield compared to a diode based on Pt film. By utilizing various Pt/TiO2 nanostructures, we found that the ratio of interface to metal sites significantly affects the selectivity, thereby enhancing chemicurrent yield in methanol oxidation. Density function theory (DFT) calculations show that formation of the Pt-TiO2 interface showed that selectivity to methyl formate formation was much larger in Pt nanowire arrays than in Pt films because of the different reaction mechanism.

scholarly journals Importance of metal-oxide interfaces in heterogeneous catalysis: A combined DFT, microkinetic, and experimental study of water-gas shift on Au/MgO

2017 ◽  
Vol 345 ◽  
pp. 157-169 ◽  
Author(s):  
Zhi-Jian Zhao ◽  
Zhenglong Li ◽  
Yanran Cui ◽  
Houyu Zhu ◽  
William F. Schneider ◽  
...  
Keyword(s):  
Experimental Study ◽  
Heterogeneous Catalysis ◽  
Metal Oxide ◽  
Water Gas Shift ◽  
Oxide Interfaces ◽  
Water Gas

scholarly journals Boosting hot electron flux and catalytic activity at metal–oxide interfaces of PtCo bimetallic nanoparticles

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Hyosun Lee ◽  
Juhyung Lim ◽  
Changhwan Lee ◽  
Seoin Back ◽  
Kwangjin An ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Bimetallic Nanoparticles ◽  
Electron Flux ◽  
Hot Electron ◽  
Oxide Interfaces

Enhanced hot electron generation by inverse metal–oxide interfaces on catalytic nanodiode

2019 ◽  
Vol 214 ◽  
pp. 353-364 ◽  
Author(s):  
Hyosun Lee ◽  
Sinmyung Yoon ◽  
Jinwoung Jo ◽  
Beomjoon Jeon ◽  
Taeghwan Hyeon ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Hot Electron ◽  
Electron Dynamics ◽  
Oxide Interfaces ◽  
Electron Generation ◽  
Catalytic Nanodiode ◽  
Metal Interfaces ◽  
Mechanistic Understanding

Mechanistic understanding of hot electron dynamics at inverse oxide/metal interfaces from a new catalytic nanodiode that exhibits nanoscale metal–oxide interfaces.

scholarly journals Enhanced flux of chemically induced hot electrons on a Pt nanowire/Si nanodiode during decomposition of hydrogen peroxide

2020 ◽  
Vol 2 (10) ◽  
pp. 4410-4416
Author(s):  
Heeyoung Kim ◽  
Ye Ji Kim ◽  
Yeon Sik Jung ◽  
Jeong Young Park
Keyword(s):  
Hydrogen Peroxide ◽  
Charge Transfer ◽  
Metal Oxide ◽  
Charge Transport ◽  
Transmission Probability ◽  
Hot Electrons ◽  
Semiconductor Interface ◽  
Oxide Interfaces ◽  
Chemically Induced ◽  
Pt Nanowires

To investigate the charge transfer at the metal–semiconductor interface, novel Pt nanowires/Si nanodiodes were fabricated. By detecting hot electrons during H2O2 decomposition, higher transmission probability for charge transport through metal–oxide interfaces was observed.

Surface chemistry of hot electron and metal-oxide interfaces

2021 ◽  
pp. 100532
Author(s):  
Si Woo Lee ◽  
Hyunhwa Lee ◽  
Yujin Park ◽  
Heeyoung Kim ◽  
Gabor A. Somorjai ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Surface Chemistry ◽  
Hot Electron ◽  
Oxide Interfaces

STRUCTURE OF METAL-OXIDE INTERFACES

1985 ◽  
Vol 46 (C4) ◽  
pp. C4-135-C4-140 ◽  
Author(s):  
M. Leseur ◽  
B. Pieraggi
Keyword(s):  
Metal Oxide ◽  
Oxide Interfaces ◽  
Structure Of Metal
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